4001201320 has 32 divisors (see below), whose sum is σ = 9053013600. Its totient is φ = 1591536448.

The previous prime is 4001201297. The next prime is 4001201327. The reversal of 4001201320 is 231021004.

It is a super-2 number, since 2×4001201320² = 32019224006339484800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 4001201320.

It is not an unprimeable number, because it can be changed into a prime (4001201327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 272254 + ... + 286573.

It is an arithmetic number, because the mean of its divisors is an integer number (282906675).

Almost surely, 2^4001201320 is an apocalyptic number.

4001201320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4001201320 is an abundant number, since it is smaller than the sum of its proper divisors (5051812280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4001201320 is a wasteful number, since it uses less digits than its factorization.

4001201320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559017 (or 559013 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 4001201320 is about 63255.0497588928. The cubic root of 4001201320 is about 1587.5599507812.

Adding to 4001201320 its reverse (231021004), we get a palindrome (4232222324).

The spelling of 4001201320 in words is "four billion, one million, two hundred one thousand, three hundred twenty".